Programs using the WebBrowser require that IE is installed

If your program uses the WebBrowser control or any Microsoft Internet Control, you must ensure (and clearly specify in your app's documentation) that the program can only work on systems that have Internet Explorer installed. In fact, the WebBrowser control is embedded in the ShDocVw.Dll file, which can't be redistributed under current licence policy. For this reason, the Package and Deployment Wizard doesn't include the ShDocVw.Dll file in the list of files to be included in the setup package.